Angry Birds: Power Cards starts out like a game of Top Trumps however the player is also building a structure with cards they win and then need to find a pig to launch at. To build structures: When a player wins a card they can build a structure with the card they won. Building supplies are wood, ice and stone, and your entire structure needs to be the same materiel. Slingshot round: After a pig has been added to a players structure, players read out the slingshot value on their cards and see who wins. Last player with cards wins.